The barograph recording shows two large swings in barometric pressure .  Each trace represents two days and the two traces are a week apart, in November.  Each vertical line represents two hours.

The Bendix barograph is always within 0.01″ of the Davis barometer in my shack.  The Davis is outside the house and the Bendix is in my radio shack.  The Bendix is one of three barographs given to me by our former Net Manager, Bill Claflin, now deceased.  Bill was a good friend and I miss him.

Dick, K1MGH